1991 Croatian Lottery Cup

The 1991 Croatian Lottery Cup, also known as the Croatian Lottery Cup – Bol Ladies Open was a women's tennis tournament played on outdoor clay courts in Bol, Yugoslavia that was part of Tier V of the 1991 WTA Tour.

It was the inaugural edition of the tournament and was held from 22 April through 28 April 1991.

Second-seeded Sandra Cecchini won the singles title.

Sandra Cecchini defeated Magdalena Maleeva 6–4, 3–6, 7–5 Laura Golarsa / Magdalena Maleeva defeated Sandra Cecchini / Laura Garrone 6–3, 1–6, 6–4